This page provides a starting point for finding information about resources that are used by applications that are deployed on a Java Enterprise Edition (Java EE)-compliant application server. They include:
You can enable your Java Platform, Enterprise Edition (Java EE) applications to use mail resources with the JavaMail API.
Java Platform, Enterprise Edition (Java EE) applications can use Uniform Resource Locators (URLs) by looking up references to logically named URL connection factories through the java:comp/env/url subcontext, which is declared in the application deployment descriptor and mapped to installation specific URL resources.